import java.util.Arrays;
import java.util.Scanner;

public class No05 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int cntBlk = sc.nextInt();
		
		int[] widthOfBlk = new int[cntBlk];
		for(int i = 0; i < widthOfBlk.length; i++){
			widthOfBlk[i] =  sc.nextInt();
		}

		int cnt = 0;
		Arrays.sort(widthOfBlk);		
		for(int w : widthOfBlk){
			int tmp = length - w;
			if(tmp >= 0){
				length = tmp;
				cnt++;
			}
		}		
		System.out.println(cnt);
	}
}